Finding the Fourth Proportional to 3,112.50, 4,667.10 and 920.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.50 : 4,667.10 = 920.93 : x
2. Step 2: Convert to fraction form
   3,112.50/4,667.10 = 920.93/x
3. Step 3: Cross multiply
   3,112.50x = 4,667.10 × 920.93
4. Step 4: Simplify right side
   3,112.50x = 4,298,049.07
5. Step 5: Solve for x
   x = 4,298,049.07/3,112.50
6. Step 6: Final answer
   x = 1,380.90